Container form, expansion joints, and method of installing same



Dec. 22, 1925.

A. c. FISCHER CONTAINER FORM, EXPANSION JOINTS, AND METHOD OF INSTALLING SAME Filed June 19, 1922 i which the following is a specification.

7 waterproof.

I To all whom it may concern:

I moulded jointsinstalled at the -ing the concrete. However, it has since was allowed to project, when a premoulde Patented Dec. 22, 1925.

' UNITED STATES ALBERT CLFISCHER, OF CHICAGO, ILLINQIS.

con'ramnn roam, 'EXPANSIOQIJOINTS, AND METHOD or ms'rannmo Application filed June 19,

- Be it known that I, ALBERT C. FISCHER, a citizen of the United States,- residing in Chicago, county of Cook, State of Illinois, have invented certain new and useful Improvements in Container Forms, Expansion Joints, and Methods of Installing Same, of

It has'been the early practice in providingexpansion joints to place a strip of wood at the intersection in the roadway, where it is desired to provide for: the expansion and contraction of the concrete, and later remove the strip and pour heated bituminous matter in the crevice.

This method was superseded by pretime of pouri been found-that joints'withfelt sides and others having interfering substances on the sides do not adhere to the walls of the concrete and consequently do not keep the crevice It is also customary to allow the joint to protrude one half to one; inch above.the finished surface, this edge over .the edges-of the concrete on either side Ofthe'joint'. j '3 When pourin the jointheretofore' a V has been formed y the heated material in settling, and'this necess'tates going over the crevice several times withxheated material,

until filled. But then no surplus was provided, as in the, case where half toone inch joint is used. j v Y 'My improvement performs two important functions, it provides a means to compel adhesion to the side walls of the concrete. and also it provides a means for forming" a protruding edge to take thewear of the trafli'c and protect the edges of the concrete; It also prevents tearing away concrete when pulling the spacing board, which has been customary in removing the wooden strips.

I furnish a container form in the shape of a covering which will fit the spacing board and protrude above the surface of t e con-- crete. This envelope is'made of saturated felt preferably, but may be made of'any suitable substance, such as, paper, cloth, bur lap, canvas or othersubstances. The-outside is preferably coated with a fair coating of so that the trafiic will work and become the sidewalls preparatory PATE NT OFFICE;

1922. Serial No. 569,247.

' The concrete is poured and allowed to set.

The envelope has a flanged base over which the concrete is placed and which acts as a holding means in preventing the container form. raising upon pullingout the backing or spacing board. When the board is removed the-container remains in place. and is filled with suitable filler. These fillers are usually heated to 300 or 400 degrees, andthis temperature will naturally compel adhesion by melting the material on the outside of the container or tainer is saturated.

To better illustrate'the process and parts involved I refer to Figure 1 of the drawing, in which (a)represents a spacing strip of any suitable material preferably wood, and

'(b) 1 a. crowning strip which can be placed.

over the base or inserted strip (a), (b) is not necessary to the functioning of this invention except as a convenient means of holding the envelope or container in place by fitting it over the folded down ends whichlater will be straightened and rotrude, thus rovid ing mould walls for the protruding ller.

Figure receive the spacing strip (a) Figure 1. The

container maybe of saturated felt coated or otherwise, or of any suitable material, as

papenca'rd-board, cloth, etc. Y i container arranged re 3 illustrates the so, the folded ends f) ma forming a protruding joint afterpourmg.

re 4 illustrates for packing or shipping {)epresenting thewa s an ase.'- I w to the ob cc' (ii-d) the folded Figure 5 with-flaring corners or while the spacingstrip removed. v

Figure 6 illustrates the container opened toreeeiving the spacing strip (0+0) re resenting the walls and (M) theflange base. T

Figure 7 illustrates the container (00) or envelo inserted with the spacing strip (a) and (3 The concrete (e) is placed on either side and formed over (a) Figure 1 is being Figu v the. spacin str p. a) removed, leaving the container 00) m the h ted filler.

illustrates the container folded flanges (dd) sothat when'opened the'flangesextend beneath the concrete and hold the container in re 8 illustrates the concrete (e)- with n.o

P e and rea y to receive the material with which the con,--

2 indicates a container folded to be straightened or the filler,-thusthe container folded place 1.

Figure 9 illustrates the completed pavement or walk (6) representing the concrete (0 2-) the container walls (H) the flanged base and (f) the protruding filler.

It may readily be understood that many modifications may be made in this invention. The joint may be installed in reservoirs, walls, sidewalks and buildings, or used for other construction purposes.

The filler may either be solid or compressible or cellular as desired. Likewise the spacing strip need not necessarily have a cap strip, and the spacing strip may be made of any suitable material that will yield to the traffic in reducing the protruding part of a the joint.

The container or envelope fitting over the spacing strip and later becomlng the mould 1n the concrete, need not necessarily be restricted to straight protruding edges, but the edges may be slightly curved in, as shown in Figure 3, and may be held in place by the cap strip (6) Figure 1.

I c aim:

1. The method of installing an expansion joint, which consists in placing in position at the joint to be formed a molding container together with a spacing board in said container, pouring the concrete along side the partition thus provided, while the spacing board is in place, and then removing the spacing board from the container, and molding into said container a bituminous material.

2. The method of providing an expansion joint for concrete pavements, which consists in placing a partition composed of a spacing board surrounded by a mold of felt or the like carrying a material softening under the influence of heat, then removing the board, and filling the mold with hot bituminous matter.

3. The method of providing an expansion joint in concrete pavements, which consists in placing a partition composed of a spacing board surrounded by a molding container, of thin flexible material, placing the concrete along side the partition thus provided, to a level below the upper margin of the container, removing the spacing board andpouring bituminous matter in the container, and building up the bituminous matter to a level above the surface of the concrete.

4. Means for forming a plastic joint for pavement sections, comprising a collapsible envelope, and a mold-board fitting said envelope and sustaining it against pressure of the pavement section at the time of laying the section; said board being removable irom the envelope after completion of the laying operation and having a form which leaves, in the envelope, a space for receiving plastic material tocomplete the joint.

5. Means for forming plastic joints for pavement sections comprising an envelope of collapsible material, constructed with upwardly extending sides and a laterally enlarging bottom portion, and amold board fitting said envelope and sustaining it against pressure of the pavement section at the time of laying the section; said board being removable from the envelope after completion of the laying operation and having a form which leaves, in the envelope, a space for receiving plastic material to comp ete'the joint.

6 Means for forming tic-pavement joint comprising a collapsible envelope of fibrous material saturated with bituminous material, and a mold-board fitting said envelope and sustaining it against pressure of the pavement section at the time of laying the section; said board being removable from the envelope after completion of the laying operation andhaving a form which leaves, in the envelope, a space for receiving plastic material to complete the joint.

7. Means for forming an expansion joint for a sectional pavement, comprising an envelope ha ving upwardly extending sides, a rigid mold board fitting-said envelope, and a crowning strip removably fitted to the upper edge of said mold board and confining the sides of the envelope thereto.

Signed at Chicago, Illinois, this 12th day of June, A. D. 1922.

ALBERT C. FISCHER.

a water-proof plas- 

